Claude Sonnet 5.5
by Anthropic · claude-sonnet family · released 2026-09-28
On output pricing, Claude Sonnet 5.5 is cheaper than 185 of the 735 priced models tracked here, at $10/Mtok. Its 1,000,000-token context window is larger than 700 of 853 models. Capabilities: vision, tools, reasoning, structured output.
Specifications
| Provider | Anthropic |
| Family | claude-sonnet |
| Input price | $2/Mtok |
| Output price | $10/Mtok |
| Cache read price | $0.2/Mtok |
| Cache write price | $2.5/Mtok |
| Context window | 1,000,000 |
| Max output tokens | 128,000 |
| Input modalities | text, image, pdf |
| Output modalities | text |
| Capabilities | vision, tools, reasoning, structured output |
| Knowledge cutoff | 2026-06-01 |
| Released | 2026-09-28 |
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